Houston, who had been preparing to attend the bash, was found unconcious in her room. While Davis' party went on, police and coroner's officials swarmed the fourth floor where Houston was staying looking for clues of her death.

There was no immediate word on the cause of her death, which could be delayed up to six weeks pending toxicology tests. However, Beverly Hills police issued a statement saying, "There were no obvious signs of criminal intent."

Houston was discovered around 3:30 p.m. by a member of entourage, believed to be her assistant. The woman's panicked screams could be heard in adjacent rooms. According to TMZ, Houston was found with her face underwater in her bathtub. A source told E! News Houston has had prescriptions for antidepression and antianxiety medications for years.

Members of Houston's entourage and paramedics—already on scene for Davis' party—attempted to revive the star to no avail. She was pronounced dead at 3:55.

Davis, the longtime producer and mentor of Houston, announced before the party that he was "personally devastated by the loss of somebody who meant so much to me. Whitney was so full of life. She was so looking forward to tonight...she loved music. She loved this night. Let's celebrate music."

"She graced this stage with her regal presence so many times," he went on. "Simply put, Whitney would have wanted the music to go on and her family asked us to carry on."

While there have been no immediate words of funeral plans, Houston's childhood church, the New Hope Baptist Church in her native Newark, N.J., held a special prayer service Sunday morning in memory of Houston and offering support to her daughter, Bobbi Kristina, and mother, Cissy.